Spectrum analyzers display the amplitude of an input signal versus frequency. Typically the frequency extends along the X-axis and the amplitude extends up the Y-axis of the display. They are used to measure the spectrum of an unknown signal within the frequency range of the particular analyzer ...

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56 views

Choosing Oscilloscope with appropriate bandwidth for Jitter analysis

Can someone give me a rule of thumb of choosing Oscilloscope with appropriate bandwidth for the Jitter analysis of clock signals? What device is highly preferable: spectrum analyzers, frequency ...
23
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2answers
2k views

Can anyone explain this high-frequency “alien voodoo black magic”?

I was casually watching Mike tear down a spectrum analyser (13:30 is the relevant part, 16:50 is the awesome part), and he came across what he aptly described as "weird messed up alien voodoo black ...
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110 views

Measuring Power per Hertz of a RF signal

I am testing my communication application to see it's performance over different frequencies. So I need to measure power at different frequencies of operation. I have been told that my limitation for ...
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0answers
68 views

Capturing Data Samples of a signal centered at 13.56 MHz using GNU Radio/Real time spectrum analyzer

I am working with NFC for my research and I have to intercept the communication signal at 13.56 MHz. I am supposed to take about 80,000-100,000 data samples (in time domain) for my Matlab routine for ...
3
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1answer
124 views

finding rf 175 Mhz harmonic source

I have a device that I am pre testing to find possible issues with unintentional rf radation. The processor is a pic32 running at 80MHz, and is connected to a ti dp83848 ethernet phy in mii mode ...
3
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0answers
382 views

Disabling the camera auto white balance

I've decided to use standard web-camera as a simple spectrograph, being inspired by this website (and this one too). The device actually works, as you may see on the image: But you may see on the ...
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1answer
281 views

Building a cheap and stable microwave network analyser or oscillator (2-5GHz)

I am interested in measuring the changing dielectric constant of a liquid as it undergoes a process. My background research of scientific articles shows that the 2-5GHz range provides the best ...
2
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2answers
115 views

Does it make sense to plot the angle in an signal spectrum analyzer?

I've built a toy oscilloscope with an Arduino, acquiring the samples with the ADC and plotting the spectrum on my computer. The spectrum is the output of the FFT algorithm. You can see a video here of ...
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2answers
146 views

Spectrum Analyzer: Resolution Bandwidth vs Acquisition Time

Why a smaller resolution bandwidth (RBW) in a swept tuned spectrum analyzer RBW requires longer acquisition time?
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183 views

FCC verification and analyzer choice

I am in the design stage of a control surface that controls a remote audio DSP through ethernet. My plan is to target FCC 15 class A. The processor is a pic32 running at 80mhz. First question, what ...
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2answers
2k views

Oscilloscope with FFT or a Spectrum Analyzer?

Could someone explain to me please which aplications demand one and the other and why? As far as I read it's all about the 'db', is it true? And why?
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1answer
83 views

Input impedance of a GenRad 2512 Spectrum Analyzer [closed]

Does anyone know the input impedance on the General Radio Model 2512 Spectrum Analyzer?
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172 views

Generic Active Probes

I need an active probe for use with a spectrum analyzer and oscilloscope. My scope has contacts around the BNC connector for powering a compatible probe. The spectrum analyzer is a different story. ...
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299 views

how to use a spectrum analyzer?

This is a new topic to me so it would be great if someone could give me a few pointers. I have an amplifier that I would like to get the frequency response for and a spectrum analyser with Probes A, ...
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1answer
115 views

Do comercial spectrum analyzers show a single-sided spectrum?

If I use a Bessell function to compute sidelobe power - do I need to double this power to get the power I will read on the specan?
2
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3answers
798 views

Designing a Audio Spectrum Analyzer

I want to design a simple LED audio spectrum analyzer kinda like this. Which method would be less expensive to do: Use many filters for each frequency band, depending on how much bands and LEDS I ...
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2answers
192 views

What's a good spectrum analyzer to learn with?

I'm trying to learn more about building RF circuits and I want to buy a spectrum analyzer. I've looked around on ebay, and a lot of them are really expensive. I'm a student, so I don't have a lot of ...
3
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2answers
347 views

What's the cheapest way to do basic EMI testing?

I need to test that my project will not interfere with radios in the 27 - 72 MHz band. I can't afford a spectrum analyser. Nor can I afford to buy all tx/rx pairs in between 27 and 72 MHz (27, 35, ...